Re: copy_from_user() fixu
H. Peter Anvin (hpa@transmeta.com)
Mon, 24 Aug 1998 16:38:47 -0700 (PDT)
> > >
> > > ??? What's wrong with EFAULT?
> >
> > It usually goes undetected.
>
> Yeah, but only by buggy programmes. I trap for error codes in all my
> code: I don't want a SEGV, I want to handle it gracefully. You could
> just as well say when malloc(3) fails, send a SEGV, since "some"
> applications will ignore the failure case.
> Besides, EFAULT is the standard for Unix. Surely SEGV is non-Posix?
>
No, it's not. EFAULT is non-POSIX: it exposes the difference between
system calls and library functions.
EFAULT is triggered by the same thing as SIGSEGV; the distinction is
artificial.
-hpa
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